JP2009155899A - Damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper capable of damping building vibration by a disturbance caused by normal wind and building vibration by earthquake motion, while suppressing cost. <P>SOLUTION: This damper calculates a control force by either a first calculation part 11 for calculating a control force corresponding to a swing by wind or a second calculation part 12 for calculating a control force corresponding to a long frequency earthquake motion by using a control mode selector means 14 according to an output from an earthquake motion detection means. When an earthquake motion is detected by the earthquake motion detection means, the control mode selector means 14 immediately switches the calculation parts 11, 12, and the second calculation part 12 calculates the control force corresponding to the long frequency earthquake motion. According to the control force, a damping mechanism for suppressing the oscillation of a building is controlled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration damping device capable of damping a building that is shaken by a long-period earthquake as well as damping a building that is shaken by a wind.

Conventionally, as a device for suppressing the vibration of a building caused by an earthquake, an apparatus including a damping unit that gives control force to the building and a calculation unit that calculates necessary control force based on earthquake information has been proposed. (For example, refer to Patent Document 1). Here, although such a vibration damping device works effectively when an earthquake occurs, it cannot cope with disturbances such as wind that occur during normal times. In view of this, there has been proposed an apparatus that suppresses vibrations of buildings including not only earthquakes but also wind disturbances (see, for example, Patent Documents 2 and 3). Each of these vibration control devices has a control logic for calculating a control force based on a response amount such as a magnitude of a disturbance such as a seismic wave or a displacement of a building as a calculation means. Based on this, the control force by the vibration control means was set every moment to control the building.
JP 2006-45885 A JP-A-9-78882 Japanese Patent Laid-Open No. 2003-58256

  However, in the vibration damping devices of Patent Documents 2 and 3, for example, when a control force is calculated using a control logic corresponding to a disturbance such as a wind other than an earthquake, It was difficult to cope with a sudden increase in disturbance. In recent years, long-period ground motion has become a problem in high-rise buildings, and when this long-period ground motion occurs, the vibration continues for a long time, so the operating amplitude becomes excessive and an effect is expected. There was a problem that made it impossible. In addition, it is very complicated and difficult to make the control logic and the hardware device compatible with both disturbances such as wind and earthquake motion, and there is a problem that costs increase.

  The present invention is intended to solve the problems of the prior art, and suppresses both vibration suppression of buildings due to disturbances such as normal wind and vibration suppression of buildings due to earthquake motion while keeping costs low. An object of the present invention is to provide a vibration damping device that can be provided.

  In order to achieve the above object, the problem-solving means of the present invention includes a vibration control mechanism that provides a control force that suppresses shaking of a building in response to disturbances such as wind fluctuations of buildings and vibrations caused by long-period earthquakes, and generation of earthquake vibrations. And a control means for outputting a control signal for driving the vibration control mechanism. The control means includes a first calculation unit and a length for calculating a control force corresponding to wind fluctuation. A control force calculation means having a second calculation unit for calculating a control force corresponding to a periodic earthquake motion, and the first calculation unit or the first And control mode switching means for causing one of the two calculation units to calculate the control force.

  In the long-period seismic response control device configured as described above, the presence / absence of occurrence of ground motion is determined based on the output of the ground motion detection means, and the control mode switching means responds to the output of the ground motion detection means to The control force is calculated by either the first calculation unit that calculates the control force corresponding to the shaking or the second calculation unit that calculates the control force corresponding to the long-period ground motion. As a result, when the seismic motion is detected by the seismic motion detection means, the control mode switching means immediately switches the calculation unit, and the second calculation unit calculates the control force corresponding to the long-period ground motion. And according to this control force, the vibration suppression mechanism which suppresses the shaking of a building can be controlled. That is, in the long-period seismic response control device of the present invention, the control logic corresponding to the wind fluctuation is set in the first calculation unit, and the control logic corresponding to the long-period earthquake motion is set in the second calculation unit. By selecting either of these two calculation units using the control mode switching means, the control logic can be adapted to both disturbances such as wind and earthquake motion. Since the processing can be executed by one hardware device, the cost can be reduced by simplifying the structure in terms of hardware.

  In the problem solving means of the present invention, the control force applied to the damping mechanism is determined based on the state quantity indicating the vibration state in the first calculation unit and the second calculation unit of the control force calculation unit. It switches to the active state which adjusts the magnitude | size of a vibration, and the passive state which stops giving active control force to this damping mechanism.

  In the long-period seismic response control device configured as described above, the first calculation unit and the second calculation unit of the control force calculation unit apply the vibration control mechanism to the vibration suppression mechanism based on the state quantity indicating the vibration state. Since the active state where the magnitude of the control force is adjusted is switched to the passive state where the application of the active control force to the vibration control mechanism is stopped, the vibration caused by disturbances such as wind or long-period earthquakes When the limit is exceeded, active control force application can be stopped to protect the device.

  In the problem solving means of the present invention, the damping mechanism is braked based on a state quantity indicating a vibration state in the first calculation unit and the second calculation unit of the control force calculation unit. It is characterized by switching to a brake state in which the vibration suppression operation is forcibly stopped.

  In the long-period seismic response control device configured as described above, the first control unit and the second calculation unit of the control force calculation means brake the vibration control mechanism based on the state quantity indicating the vibration state. To switch to a braking state that forcibly stops the vibration suppression operation.If the vibration due to wind or other disturbances or the vibration due to a long-period earthquake exceeds the limit, the vibration suppression operation is performed to protect the device. Can be braked.

  The problem solving means of the present invention further includes acceleration detecting means for detecting vibration acceleration of a building which is one state quantity of vibration, and the first calculating section and the second calculating section of the control force calculating means are provided in the first calculating section and the second calculating section. Then, based on the detection result of the acceleration detection means, the brake mechanism is braked to switch to a brake state for forcibly stopping the vibration suppression operation.

  In the long-period seismic response control device configured as described above, the first calculation unit and the second calculation unit of the control force calculation unit brake the vibration suppression mechanism based on the detection result of the acceleration detection unit. Switch to the brake state to forcibly stop the vibration control operation. In other words, because the building is switched to the braking state based on the vibration acceleration that directly indicates the state of the building due to vibration, when the building is shaken suddenly due to a severe earthquake, etc., the operation to apply the brake to protect the device immediately Can be executed.

  In the vibration control device for long-period earthquake of the present invention, the control logic corresponding to the wind fluctuation is set in the first calculation unit, and the control logic corresponding to the long-period earthquake motion is set in the second calculation unit, By selecting one of the two calculation units by the control mode switching means, the control logic can be adapted to both disturbances such as wind and earthquake motion. Further, the calculation process in such a calculation unit is 1 Since it can be executed by one hardware device, it is possible to reduce the cost by simplifying the structure in terms of hardware.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 shows a high-rise building 1 in which a long-period earthquake damping device 100 according to the present invention is installed. On the roof of this building 1, an HMD (hybrid mass damper) to which active damping technology is applied is controlled. A vibration mechanism 2 is provided. This vibration control mechanism 2 strokes the weight, which is a vibrating device of a device that swings like a pendulum, in a direction that cancels the shaking of the building, so that the influence of disturbance on the building 1 such as shaking due to strong winds and after shaking after an earthquake is affected. It is to reduce.

  The vibration control mechanism 2 is provided with a control panel that gives a control force for causing the aforementioned weight to stroke in a direction to cancel the shaking of the building. A state quantity detection sensor 4 for detecting a state quantity of vibration is provided on the roof of the building 1 and on the ground surface where the building 1 is located. As this state quantity detection sensor 4, for example, a displacement sensor for measuring the displacement of the building 1 or the vibration control mechanism 2, a stroke quantity detection sensor for detecting the stroke quantity of the vibration body of the vibration control mechanism 2, the ground, the building 1 or There are a speed sensor that detects the speed of the vibration control mechanism 2, an acceleration sensor that detects the acceleration of the ground, the building 1, or the vibration control mechanism 2, and each detection data is taken into the control means 3. In the vibration damping device 100 of this embodiment, the state quantity detection sensor 4 includes a ground motion detection sensor 4A that directly detects ground acceleration due to an earthquake, a building acceleration sensor 4B that detects acceleration of the building 1, and a vibration damping. A stroke amount detection sensor 4C for detecting the stroke amount of the mechanism 2; In the present embodiment, the seismic motion detection sensor 4A is used as the seismic motion detection means 13 for detecting the occurrence of seismic motion. The control means 3 is described later based on detection signals from the seismic motion detection sensor 4A functioning as the seismic motion detection means 13, and the building acceleration sensor 4B and the stroke amount detection sensor 4C for detecting other vibration state quantities. Execute control to

  Next, the specific configuration of the control means 3 will be described with reference to the functional block diagram of FIG. As shown in FIG. 2, the control means 3 determines the presence or absence of occurrence of earthquake motion from the control force calculation means 10 for calculating the control force by the vibration control mechanism 2 and the detection signal from the earthquake motion detection sensor 4 </ b> A which is the earthquake motion detection means 13. And control mode switching means 14 for switching the control logic by the control force calculation means 10. The control force calculation means 10 includes a first calculation unit 11 that calculates a control force corresponding to wind fluctuations, and a second calculation unit 12 that calculates a control force corresponding to earthquake motion. The first calculation unit 11 and the second calculation unit 12 are the same in the CPU 3 constituting the hardware in the control means 3 and are distinguished by an execution program for calculating the control force. In the calculation units 11 and 12, the force (F) for pushing the device vibrating body by the motor in the vibration damping mechanism 2 according to the state of vibration due to wind fluctuation or earthquake of the building 1, that is, to the vibration damping mechanism 2. The magnitude of the control force is adjusted. More specifically, the first calculation unit 11 has a control logic represented by Formula 1 suitable for a disturbance that normally acts such as wind. Moreover, the 2nd calculating part 12 has a control logic different from the 1st calculating part 11 shown by several 2 suitable for the disturbance which acts by a seismic motion. The first calculation unit 11 and the second calculation unit 12 may be formed by dividing the CPU constituting the hardware into two on the program, or may be formed on different CPUs. By providing 12, each hardware configuration itself may be different.

Here, in Equations 1 and 2, G _{1 to} G _N are normal countermeasure gains (arbitrarily designed constants), and G ′ _{1 to} G ′ _N are earthquake countermeasure gains (arbitrarily designed). X _{1 to} X _N are state quantities (building displacement / velocity / acceleration and device displacement / velocity / acceleration, etc., which are obtained by measurement and cannot be determined arbitrarily) Numerical value).

The earthquake countermeasure gain is obtained by multiplying each of the normal countermeasure gains G _{1 to} G _N by the corresponding coefficients α _{1 to} α _N , and may be a control logic represented by the following Equation 3. In this case, if possible, all of α _{1 to} α _N may be set to the same value.

  As the earthquake motion detection means 13, in addition to the above-described earthquake motion detection sensor 4A, a building acceleration sensor 4B, a stroke amount detection sensor 4C, an existing vibration sensor installed in an elevator, an external system such as an emergency earthquake warning, etc. are also used. Is possible. That is, the state quantity detection sensor 4 and the seismic motion detection means 13 described above may be the same or different, and any state quantity detection is possible as long as the seismic motion can be detected directly or indirectly. The sensor can also be a seismic motion detection means.

Next, the control contents of the control means 3 will be described with reference to the flowcharts shown in FIGS.
Steps S1 to S3: First, as shown in FIG. 3, an initial state in which the apparatus is in a stopped state is set as the first step S1. In the next step S2-1, it is determined whether or not an earthquake has occurred based on the output of the earthquake motion detection sensor 4A. If YES, the process proceeds to the next step S3 (earthquake countermeasure mode) shown in FIG. In this case, the process proceeds to the next step S2-2 (normal countermeasure mode). That is, in a normal time when no earthquake motion occurs, the process proceeds to step S2-2. In step S2-2, it is determined whether or not the building 1 is shaking (due to disturbance such as wind) based on the output of the building acceleration sensor 4B. If YES, the process proceeds to steps S11 to S15 shown in FIG. If NO, the process returns to the first step S1. In step S2-1, the occurrence of an earthquake is determined by whether or not an acceleration exceeding a preset threshold A (for example, 2Gal) has occurred for a predetermined cycle N (for example, 2 cycles) within a certain time. Determination conditions including such a threshold value can be arbitrarily set in these steps S2-1. Similarly, in step S2-2, the occurrence of a disturbance such as wind is determined based on whether the building acceleration exceeds a set value.

Next, FIG.4 and FIG.5 is shown about the case where the earthquake has occurred after step S3, and the case where the disturbance such as the wind has occurred in the normal time after step S2-2. Reference will be made to each step with reference.
First, a case where an earthquake has occurred after step S3 will be described with reference to FIG.
Step S3: Assuming that an earthquake has occurred, the vibration control mechanism 2 is set to the “active state” to perform vibration control. Specifically, for the purpose of amplifying the movement of the device vibrating body in the vibration damping mechanism 2 and increasing the effect of reducing the building shake, the force (control force) that pushes the device vibrating body by the motor in the vibration damping mechanism 2. ) (F) is calculated from time to time based on the above equation (2).
In the case of the earthquake countermeasure gain design, the gain G ′ _{1 to} G G is determined when it is found that the apparatus vibration body stroke exceeds the limit value by the simulation in which the normal wind fluctuation gain is applied to the design earthquake motion. ' _N is recalculated (it is set to a smaller value, and the force pushing the device vibrating body with the motor is reduced), and the operation of confirming again by simulation is repeated. As a result, the earthquake countermeasure gain is set to an optimum value.

  Step S4: Based on the output from the building acceleration sensor 4B, it is determined whether or not the acceleration of the building 1 has exceeded a preset first reference value B1 (for example, 20 Gal). If a sudden shake (not a long-period earthquake) has occurred, the process proceeds to step S11 to shift to the brake state, where the vibration damping mechanism 2 is braked directly to protect the device. On the other hand, if NO, the process moves to the next step S5.

  Step S5: Based on the output from the building acceleration sensor 4B, it is determined whether or not the state in which the building acceleration is equal to or less than the second reference value B2 (for example, 1 Gal) continues for a predetermined time T1 (for example, 1 minute), In the case of YES, it returns to step S1 shown in FIG. 3 and stops the apparatus. On the other hand, if NO, the process moves to the next step S6.

  Step S6: The stroke amount of the vibration damping mechanism 2 is detected based on the output of the stroke amount detection sensor 4C, and the stroke amount of the vibration damping mechanism 2 has exceeded a preset first boundary value C1 (for example, 80 cm). If NO, the active state is continued. On the other hand, in the case of YES, the process proceeds to the “passive state” in step S7.

  Step S7: Since the stroke of the device vibrating body in the vibration damping mechanism 2 has reached its limit due to an increase in earthquake vibration, a “passive state” is set in which active control force application to the vibration damping mechanism 2 is stopped. That is, by setting the passive state, the apparatus vibration body of the vibration suppression mechanism 2 does not perform vibration amplification by the motor, and vibrates according to the vibration characteristics possessed by itself. For this reason, it is possible to prevent the stroke of the device vibrating body from becoming excessive due to the input of the control force.

  Step S8: Similarly to step S4, it is determined whether or not the acceleration of the building 1 exceeds a preset first reference value B1 (for example, 20 Gal). If YES, the process proceeds to step S11 and the brake state is established. If NO, the process proceeds to the next step S9.

  Step S9: Based on the output from the building acceleration sensor 4B, it is determined whether or not the state where the building acceleration is equal to or less than a third reference value B3 (for example, 6 Gal) continues for a predetermined time T2 (for example, 25 seconds), In the case of YES, the process returns to the “active state” in step S3. On the other hand, in the case of NO, the process proceeds to the next step S10.

  Step S10: The stroke amount of the vibration damping mechanism 2 is detected based on the output of the stroke amount detection sensor 4C, and the stroke amount of the vibration damping mechanism 2 has exceeded a preset second boundary value C2 (for example, 90 cm). If it is NO, the passive state is continued. On the other hand, in the case of YES, the process proceeds to the “brake state” in the next step S11.

  Step S11: It is assumed that there is a risk that the stroke of the vibration body of the vibration control mechanism 2 in the vibration suppression mechanism 2 may exceed the limit and collide with the device structure due to further vibration increase of the earthquake, so that the brake mechanism 2 is braked. Transition.

  Step S12: Next, based on the output from the building acceleration sensor 4B, whether or not the state where the building acceleration is equal to or less than a fourth reference value B4 (for example, 20 Gal) continues for a predetermined time T3 (for example, 25 seconds) or not. If the determination is YES, the process returns to the “passive state” in step S7. On the other hand, in the case of NO, the “brake state” is continued.

  In steps S3 to S12 for earthquakes described above, even after a normal earthquake that is not a long-period earthquake has occurred, the processing in step S3 and subsequent steps is executed after the determination in step S2-1. However, in the case of an earthquake at a short distance that is not a long-period earthquake and a relatively large tremor, the brake is immediately applied to the damping mechanism 2 in the determination in step S4 (YES determination in step S4). Damping operation is stopped. On the other hand, in a long-period earthquake, since the shaking is slow, YES is not determined in step S4, and steps S4 to S6 are looped, and the stroke amount of the vibration control mechanism 2 is preset. The active control of the vibration damping mechanism 2 is performed within a range not exceeding the boundary value C1.

In addition, although the above-described steps S3 to S12 are processing corresponding to the occurrence of an earthquake, the processing contents of the processing of steps S13 to 22 corresponding to disturbances such as wind during normal times are similar, so only the differences will be described below. explain. First, in the active state (step S13), the method for setting the active control gain of the building 1 is calculated based on the above-described formula 1, and the normal countermeasure gain (G _{1 to} G _N ) is calculated to reduce the design wind disturbance. On the other hand, it is confirmed by simulation whether the shaking of the building has been reduced to the predetermined level. If the reduction effect is small, recalculate the normal countermeasure gain (G _{1 to} G _N ) (set it to a larger value and use the motor to Repeat the work of increasing the force pushing the vibrating body) and confirming again by simulation.

  Next, in step S14, it is determined whether the acceleration of the building 1 has exceeded a preset first reference value B1 as in step S4. If YES, the process proceeds to step S21 to enter the brake state. Transition. As a result, in the case of an earthquake that is not a long-period earthquake and has a relatively large shaking, the control means 3 immediately brakes the damping mechanism 2 in steps S13 to S22 corresponding to the wind shaking, thereby suppressing damping. Stop the work. In the case of NO, the process proceeds to the next step S15. In step S15, it is determined whether or not the state where the building acceleration is equal to or less than the second reference value B5 has continued for a predetermined time T4 or more. If YES, the process returns to step S1 shown in FIG. 3 to stop the apparatus. On the other hand, if NO, the process moves to the next step S16. In step S16, it is determined whether or not the stroke amount of the vibration damping mechanism 2 has exceeded a preset third boundary value C3. If NO, the active state is continued. On the other hand, in the case of YES, the process proceeds to the “passive state” in step S17. The operation in the “passive state” is the same as when an earthquake occurs.

  Next, in step 18, it is determined whether or not the acceleration of the building 1 has exceeded a preset first reference value B1 as in step S4. If YES, the process proceeds to step S21 to enter the brake state. Transition. On the other hand, if NO, the process moves to the next step S19. In step S19, it is determined whether or not a state where the building acceleration is equal to or less than a preset sixth reference value B6 continues for a predetermined time T5 or more. If YES, the process returns to the “active state” in step S17. On the other hand, if NO, the process moves to the next step S20. In step S20, it is determined whether or not the stroke amount of the vibration damping mechanism 2 has exceeded a preset fourth boundary value C4. If NO, the passive state is continued. On the other hand, in the case of YES, the process proceeds to the “brake state” in the next step S21. Note that the operation in the “brake state” is the same as when an earthquake has occurred. Next, in step S22, it is determined whether or not the state where the building acceleration is equal to or less than the seventh reference value B7 continues for a predetermined time T6 or more. If YES, the process returns to the “passive state” in step S17. On the other hand, in the case of NO, the “brake state” is continued.

  In the active state, the earthquake countermeasure mode is steps S4 to S6, the normal countermeasure mode is steps S14 to S16, and in the passive state, the earthquake countermeasure mode is steps S8 to S10. The mode is steps S18 to S20, and in the brake state, the earthquake countermeasure mode is step S12 and the normal countermeasure mode is step S22. The same processing is performed, but different processing is performed. May be. The determination criteria set in each process can be changed as appropriate.

Here, the operation of the control means 3 when the earthquake motion occurs when operating in the normal countermeasure mode will be described. Neither the control path for countermeasures for normal times nor the control path for countermeasures against earthquakes in the passive state, the vibration control mechanism 2 does not perform the operation of amplifying the amplitude of the apparatus vibrating body by the motor. That is, it shakes with the vibration characteristics of the device itself.
For this reason,
(1) When an occurrence of earthquake motion is detected in the active state (processing in step S13 shown in FIG. 5) during normal times, as shown by an arrow (A) in FIG. Is switched to the active state (the process in step S3 shown in FIG. 4). Generally, the active control gain for earthquake countermeasures is safe because it is smaller than the active control gain for ordinary countermeasures, that is, the force for amplifying the apparatus vibration body amplitude by the motor is small.
(2) When the occurrence of earthquake motion is detected in the passive state (the process in step S17 shown in FIG. 5) in the normal state, as shown by the arrow (b) in FIG. Are switched to the passive state (the process in step S7 shown in FIG. 4). It only changes the position of the control path and has no effect on the device.
(3) When the occurrence of earthquake motion is detected in the brake state (the processing in step S21 shown in FIG. 5) in the normal state, as shown by the arrow (c) in FIG. To the brake state (the process in step S11 shown in FIG. 4). It only changes the position of the control path and has no effect on the device.

  On the other hand, even if a wind sway occurs in the control path for earthquake countermeasures, the fluctuation of the wind sway usually takes a long time according to the weather change so that it changes as the typhoon passes, After waiting for the seismic motion to leave, the control path may be switched to a normal countermeasure. Even if the device operates and earthquake motion occurs in a very strong wind like a typhoon, switch to (1) to (3) above, wait for the earthquake motion to stop, and take countermeasures during normal times. Return to the control path.

  On the other hand, the earthquake occurrence state detected in step S2-1 shown in FIG. 3 is “No earthquake occurrence” or the ground acceleration is below threshold A and continues for a predetermined time T3 or more when in an earthquake countermeasure active state. In this case, as indicated by an arrow (2) in FIG. 2, the state is immediately switched to the active state for wind sway countermeasures (processing in step S13).

  And the result of having simulated the behavior of the damping device 100 comprised as mentioned above is shown in FIGS. The simulation conditions are as follows: two HMDs as the vibration control mechanism 2 are installed, a mass of 185 tons, a vibration frequency of 0.195 Hz, a damping constant of 5.2%, and a control stroke of 170 cm. This simulation is based on the assumption of the Tokai-oki earthquake wave shown in FIG. 6 (maximum acceleration: adjusted to 8.36 Gal, observation location: Yokohama). In the vibration control device 100 of the present invention, 7 and 8 show the results when the earthquake is controlled in the normal countermeasure mode, and FIGS. 9 and 10 show the results when the earthquake is controlled in the earthquake countermeasure mode. Respectively. That is, when the vibration shown in FIG. 6 is generated, the vibration in the normal wind fluctuation mode uses the wind fluctuation gain as shown in FIGS. The stroke of the vibration body of the device in the vibration control mechanism 2 has become an overstroke, and the device has stopped. On the other hand, in the vibration suppression mode in the earthquake countermeasure mode, as shown in FIGS. 9 and 10, since the earthquake countermeasure gain is used, the stroke of the device vibrating body in the vibration suppression mechanism 2 is within the limit. As a result, it was confirmed that a continuous damping effect could be obtained without almost overstroke. As a result of the vibration suppression in the earthquake countermeasure mode, it was confirmed that the maximum absolute vibration acceleration response was reduced by 63% compared to the case of non-vibration suppression.

  As explained in detail above, in the vibration damping device 100 shown in the above embodiment, the control mode switching means 14 corresponds to the output of the earthquake motion detection sensor 4A that is the earthquake motion detection means 13 and corresponds to the normal wind fluctuation. One of the first calculation unit 11 that calculates the control force and the second calculation unit 12 that calculates the control force corresponding to the long-period ground motion is caused to calculate the control force. Thereby, when the earthquake motion is detected by the earthquake motion detection means 13, the control mode switching means 14 immediately switches between the calculation sections 11 and 12, so that the second calculation section 12 A control force corresponding to the long-period ground motion is calculated, and the vibration control mechanism 2 that suppresses the shaking of the building 1 can be controlled according to the control force. That is, in the vibration damping device 100 shown in the above embodiment, the control logic corresponding to the wind fluctuation is set in the first calculation unit 11 and the control logic corresponding to the long-period ground motion is set in the second calculation unit 12. By selecting one of the two calculation units 11 and 12 by the control mode switching means 14, the control logic can be adapted to both disturbances such as wind and earthquake motion. Since the arithmetic processing in the arithmetic units 11 and 12 can be executed even by one hardware device, it is possible to reduce the cost by simplifying the structure in terms of hardware.

  Further, in the vibration damping device 100, an active state in which each of the calculation units 11 and 12 of the control force calculation unit 10 applies an active control force to the vibration control mechanism 2 based on a state quantity indicating a long-period earthquake state. Since the switching to the passive state in which the active control force application to the vibration control mechanism 2 is stopped is performed (steps S3 to S6), when the vibration due to the wind or the vibration due to the long-period earthquake exceeds the limit The active control force application can be stopped to protect the device.

  Further, in the vibration damping device 100, the calculation units 11 and 12 of the control force calculation means 10 are switched to the brake state in which the vibration damping mechanism 2 is braked based on the state quantity indicating the state of the long-period earthquake. (Steps S3 to 8) As in the case of switching from the active state to the passive state, when the vibration due to the wind or the vibration due to the long-period earthquake exceeds the limit, the damping operation is braked to protect the device. be able to.

  In particular, in the vibration damping device 100, the vibration control mechanism 2 is activated based on the vibration acceleration indicating one state quantity of vibration detected by the building acceleration sensor 4B in each of the calculation units 11 and 12 of the control force calculation means 10. Changed from the state to the brake state. That is, since the vibration suppression mechanism 2 is switched from the active state to the brake state based on the state quantity that directly indicates the vibration state of the building 1 due to wind fluctuations or long-period ground motions (steps S4 and 8), Therefore, when the building is shaken suddenly, it is possible to immediately apply a brake to protect the device.

It is the schematic which shows the whole structure of the damping device of embodiment which concerns on this invention. It is a functional block diagram which shows the structure of a control means in the damping device of embodiment which concerns on this invention. It is a flowchart which shows the control content by a control means in the damping device of embodiment which concerns on this invention. It is a flowchart which shows the control content by a control means in the damping device of embodiment which concerns on this invention. It is a flowchart which shows the control content by a control means in the damping device of embodiment which concerns on this invention. It is a graph which shows the vibration which assumed the Tokai-oki earthquake. It is a graph which shows the apparatus installation floor absolute acceleration at the time of damping | damping in the mode for countermeasures at the time of the normal time of the damping device of embodiment which concerns on the Tokai-oki earthquake. It is a graph which shows the amount of vibrations of a device vibrating body at the time of a Tokai-oki earthquake assumption, and having made it dampen in the mode for countermeasures at the time of a normal of a vibration damping device of an embodiment concerning the present invention. It is a graph which shows the apparatus installation floor absolute acceleration at the time of making it dampen in the mode for earthquake countermeasures of the damping device of embodiment which concerns on the Tokai-oki earthquake. It is a graph which shows the amount of apparatus vibrating body strokes at the time of damping in the earthquake countermeasure mode of the damping device of an embodiment concerning the present invention at the time of the Tokai-oki earthquake assumption.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Damping mechanism 3 Control means 4 State quantity detection sensor 4A Seismic motion detection sensor 4B Building acceleration sensor 4C Stroke amount detection sensor 10 Control force calculation means 11 1st calculation part 12 2nd calculation part 13 Earthquake motion detection means 14 Control Mode switching means 100 Damping device

Claims (4)

In response to disturbances such as building wind fluctuations and long-period earthquakes, a vibration control mechanism that provides control power to suppress building shaking,
Seismic motion detection means for detecting the occurrence of seismic motion,
Control means for outputting a control signal for driving the vibration damping mechanism,
The control means includes a first calculation unit that calculates a control force corresponding to wind fluctuation, and a second calculation unit that calculates a control force corresponding to long-period ground motion;
Control mode switching means for determining the presence or absence of occurrence of ground motion based on the output of the ground motion detection means, and causing either the first computing section or the second computing section to calculate control force; A vibration control device for long-period earthquakes.   In the first calculation unit and the second calculation unit of the control force calculation means, an active state that adjusts the magnitude of the control force to the vibration damping mechanism based on a state quantity indicating a vibration state, and The long-period earthquake-adaptive vibration control device according to claim 1, wherein the vibration control device is switched to a passive state in which active control force application to the vibration suppression mechanism is stopped.   In the first calculation unit and the second calculation unit of the control force calculation unit, a brake that forcibly stops the vibration suppression operation by applying a brake to the vibration suppression mechanism based on a state quantity indicating a vibration state. It switches to a state, The long-period earthquake corresponding vibration damping device of any one of Claim 1 or 2 characterized by the above-mentioned. Comprising acceleration detecting means for detecting vibration acceleration of the building which is one state quantity of vibration;
In the first calculation unit and the second calculation unit of the control force calculation unit, a brake that forcibly stops the vibration suppression operation by applying a brake to the vibration suppression mechanism based on the detection result of the acceleration detection unit. It switches to a state, The long-period earthquake corresponding vibration damping device of any one of Claim 1 or 2 characterized by the above-mentioned.

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